The middle mouse button helps you scroll through long web pages and screens with a lot of data. If that stops, well you will end up using the keyboard for scrolling which is painful. In this post ...

How do I get the mouse scroll button to work in NT?I've plugged an USB optical mouse into a PC using a PS/2 adapter. Everything seems to work except the scroll button.Any insights anyone?

MakeUseOf details these and other scroll-wheel tips in Cool Tips to Put Your Mouse Scroll Button to Work. I use the scroll wheel constantly for plain old scrolling.

That middle button is often ignored, but you can tap its potential for browsing more efficiently, scrolling quickly, and more.

Mighty mouse scrolling stops working Apple's Mighty Mouse, despite its unique features, still uses a mechanical ball that is used for the navigation.